How to Calculate the True Cost per Kilometer for a Car
Fuel is only one part of driving cost. Include insurance, maintenance, registration, tires and depreciation.
What it does and when to use it
Cost per kilometer shows what each trip really costs by combining variable costs such as fuel with fixed costs such as insurance and depreciation.
What information to enter
Enter yearly kilometers, fuel economy, fuel price, insurance, registration, maintenance, tires and estimated yearly depreciation.
How to understand the result
The result shows cost per km, monthly cost and yearly cost. Lower mileage can make each kilometer more expensive because fixed costs are spread over fewer kilometers.
Recommended step-by-step workflow
- Check the assumptionsCost per kilometer shows what each trip really costs by combining variable costs such as fuel with fixed costs such as insurance and depreciation.
- Use matching unitsEnter yearly kilometers, fuel economy, fuel price, insurance, registration, maintenance, tires and estimated yearly depreciation.
- Compare with another scenarioThe result shows cost per km, monthly cost and yearly cost. Lower mileage can make each kilometer more expensive because fixed costs are spread over fewer kilometers.
Formula at a glance
Short example
Why this matters
Many drivers compare cars by fuel economy alone, but a fuel-efficient car can still cost more if insurance, repairs or depreciation are high.
Step by step
- Collect yearly fixed costs: insurance, registration, maintenance and depreciation.
- Estimate fuel cost from distance, efficiency and fuel price.
- Divide total yearly cost by the kilometers you actually drive.
Numeric example
In this example, every extra ₪1,500 per year adds about ₪0.10 per km when you drive 15,000 km a year.
Mistakes to avoid
- Counting fuel only and ignoring insurance or maintenance.
- Entering monthly depreciation when the field expects a yearly amount.
- Comparing a car driven 8,000 km a year with one driven 25,000 km without normalizing by distance.
When to open the calculator
Open the calculator when deciding whether to keep a car, replace a car, or estimate a fair driving reimbursement.
Common mistakes
- Counting fuel only and ignoring insurance or maintenance.
- Entering monthly depreciation when the field expects a yearly amount.
Frequently Asked Questions
Should I include depreciation?
Yes, if you want ownership cost rather than only cash paid this month.
What about parking and tolls?
Add them as extra costs if they are part of your regular driving.
Why does low mileage raise cost per km?
Insurance, registration and depreciation exist even when the car is barely driven.